Tail cutter for winding machines



y 4, 1954 J. w. MAY 2,677,507

TAIL CUTTER FOR WINDING MACHINES Filed Aug. 16, 1950 2 Sheets-Sheet 1INVENTOR:

ATTORNEYS M y 4, 1954 J. w. MAY

TAIL CUTTER FOR WINDING MACHINES 2 Sheets-Sheet 2 Filed Aug. 16, 1950Llo/vw 14 MZIY EJWM ATTORNEYS Patented May 4, 1954 UNITED STATES PATENTOFFICE V TAIL'CUTTER FOR WINDING MACHINES John W.:May,#:Penilleton, S.0.,assign'or to Deering Milliken Research Trust, Pendleton, SLO.

a nonprofit-trustof. Maine Appiic'a'tionAug'ust"16, 1950, Serial No.179,672

"8 Claims. 1 This invention relates to an improved tail cutter forwinding machines and it is especially adapted for use with a windinginachine o'f a type known as the Whitin-Schweiterautomatic fillingbobbin winder, manufactured by Whiti-n Machine Works of Whitinsville,Mass.

Heretofore machines of the type described have been equipped with a tailcuttercomprising a substantially pointed member having a knife edgewhich automatically passed adj acent br between the rings on the base ofa bobbin for severing the tail of yarn upon a bobbin being filled andprior to'its being ejected and an empty bob bin replacing the same.However, it has been found that sometimes the point of the cutting bladewill engage the base or wooden part of the bobbin adjacent or betweentherings'and-would thus damage the periphery "of the bobbin.

Moreoventhe-ringsof the bobbin are not coniplete ring-s but are splitand thus there is a gap at each ring through which the yarn tail "maypass. When the tail passed through the g'apbi the ring adjacent theblade of the prior art cutter, it would not be raised sufiiciently fromthesuriace of the bobbin "to be engaged and out o by theblade.

It is an object of this invention to overcome suchdefects by providingan improved tailcutte'r including a blade member which is normallyspaced substantially radially of the ringson the l;

into operating position, in which position "the projections will bedisposed within the spaces between the'rings on'the base of the bobbinand will engage the yarn at one or more points-where it crosses theringswith rotation of the bobbin, so as to sever or break the tail ofthe yarn. Since the projections which penetrate between the ringscn thebobbin have a total length which is less than the depth of thespacesdefined by the rings, it is impossiblefor the projections enter-=ing between the rings on the bobbin base, to engage the wooden base ofthe bobbin "and to damage the same.

More specifically, it'i's an object of this invention to provide, "in awinding machine 'of the type described a tail cutter blade adapted to bemoved into operative position in a radialplane relative to the axisofabobbin in'which'filling is being Wound, the blade being provided with aplurality of notches inone edge which coincide withthe rings onthe'b'ase of the bobbin and which define a plurality of projectionspreferably of less length than the depth of the spaces-fie fined by therings and means fer supporting the blade including a tail-cutterbled-tie supphrt'i nember pivotally supported on the machine on anparallel to the axis-0 f the bobbin 'onwhieh the filling isbeing woundand including ine'ah's automatically operable upona' 'bobbinbeing-filled for swinging the support member and 'its'elittr blade intooperative position, "there being suitable stop nieans foraccuratelydetermining the osition at which the blade will stop adjacent the baseof the b'obbinso the projections-on theb lade will extend 'past theperipheries-of the'ri'ng s'on the base of the bobbin and will terminatein closely spaced relation to the periphery of the base of the bobbinwithout engaging the same, but close enough to the bbbbin that thesp'aeebetween the projections and the base will'b'eless than the diameter ofthe yarn.

It is another" object 'of'the invention 'tojprovid'e a tail cutter ofthe "type described with'spr'ihg means interposed between the tailcutter *blai ie support member and the means for actuating movement ofsaid member so as to permit the said actuating ineanstocontinue itsmovement after the blade on the blade support member has 'rnoved to thedesired position in closely spaced relation to the base of thebobbin-anti whereby the actuating means for the tail-butter bladesupport member need not 'be precise as to its'length of stroke.

Some of the'objects 'of the invention having been. stated, other objectswill appear as the description proceeds when taken in connection withthe accompanying "drawings, in which Figure "1 is a fragmentary sideelevation of a winding machine .Of the type described "with many of theparts'broken away and those parts which are not pertinent to thepresentihv'entioh being omitted for purposes .of clarity;

Figure 2is an enlarged iraginentaryelevation with parts in sectionlooking substantiallyalong the line 22 in Figure l with manyrof theparts broken away .for purposes of clarity and showing theimproved'tailzcutter in operating position;

Figure 3 is a fragmentary ltopzplan View 106%:- ing substantially atnthe'top-of Figure 2;

Figure 4 is a sehematic fragmentary isometric view-looking substantiallyill the directioh b'flili arrow 4 in-Figure 3 but'showing the tailcuttei' in an inoperative position; c

Figure '5 is a schematie fragmentary elevatibfh looking substantiallyalong the line 5-5 in Figure 2;

Figure 6 is a schematic fragmentary elevation similar to Figure 5 butshowing a modified form of blade for engaging and severing the tail ofyarn.

Referring more specifically to the drawings, the numeral l6 broadlydesignates the framework of an automatic filling winding machine of atype such as is manufactured by Whitin Machine Works, Whitinsville,Mass, and which is generally known as a Whitin-Schweiter automaticfilling bobbin winder. This framework [6 includes a casing H in whichconventional gearing and cams, not shown, are disposed for effectingoperation of the various conventional parts of the machine. Theframework it! also includes a horizontally disposed fixed rod 12 whichextends outwardly from the front of the casing ii and which has aconventional front stud plate l3 suitably secured thereto in which aconventional manually operable cam lever rod trigger it has pivotalmovement.

. This rod l2 usually supports a stationary bobbin holder, not shown inthe present drawings,

but which is clearly shown in a patent to W. Schweiter, No. 2,268,310 ofDecember 30, 1941. The front stud plate (3 also has a shaft i5 extendingrearwardly therefrom in parallel relation to the rod [2 which alsoassists in supporting the said stationary bobbin holder, not shown; Aconventional rock shaft 16 is also supported at opposed ends thereof inthe casing II and the front stud plate l3 and is instrumental insupporting and effecting operation of a conventional yarn feed carriage20, portions of which are broken away and only those parts which arepertinent to the present invention being shown in Figure 1.

The conventional gearing, not shown, disposed within the casing l l isinstrumental in effecting intermittent rotation of a shaft 2| having asprocket wheel 22 fixed thereon on which a conventional carriageoperating chain 23 is mounted. Opposed ends of this chain 23 areconnected to the front and rear ends of the carriage 26, as at 24 and 25respectively. This chain also passes over a conventional roller 21rotatably mounted, as at 36, on the stud plate l3. The automatic windingmachine also includes a conventional r spring loaded chuck member orbobbin head holder 32 which is moved into and out of operating positionby conventional automatic means, not shown, disposed within the casing Hand to which bobbins are directed, during a transfer operation, from achute 33 suitably supported on the framework 16. There is only onebobbin shown in Figures 1, 2 and 3, this bobbin being designated at 34.The particular type of bobbin on which yarn is usually wound on machinesof this type has an enlarged base 35 provided with a plurality of spacedperipherally disposed rings 36, these rings usually being made of metaland the bobbin base 35 usually being made of wood.

The conventional carriage 20 has a knock-off projection integraltherewith which, upon a desired amount of yarn being Wound onto thebobbin 34, will engage a mating knock-off block 4| secured, as by ascrew 42, on a conventional cam lever rod 43. This cam lever rod 43 isconnected at its front end, in a conventional manner, intermediate theends of the pivoted cam lever rod trigger [4. The rear end of the camlever rod 43 is connected, as by a stud 44, to the screws 6|.

lower end of an arm 45 which extends upwardly, in Figures 1 and 2, andis fixedly mounted on the outer end of a conventional cam shaft 46extending from the casing II at one side of the framework l0.

It is thus seen that, upon the knock-off projection 40 of the carriage20 engaging the mating knock-off block 4|, the block 4|, along with thecam lever rod 43, will move from left to right in Figure 1 thus causingthe arm 45 and the shaft 46 to move in a counter-clockwise direction.This will condition the conventional parts, not shown, of the machinewithin the casing ll so as to cause the transfer of a bobbin from thebobbin holder 32 to be replaced by an empty bobbin in a conventionalmanner. This particular type of winding machine also includes aconventional shaft 41 having an arm 50 fixed thereon which is providedwith a cam follower 5! in one end thereof for engaging a conventionalback wind cam 52. There is also shown, in Figure 1, a conventionalcontrol knob 53 which is adapted to be manually positioned relative to apin 54, and spaced below the control knob 53 is a picking finger unit55. The parts 41 to 55 are shown merely to illustrate that these partswill not interfere with operation of the invention. The parts 41 to 55are, otherwise, not pertinent to the present invention and a detaileddescription thereof is deemed unnecessary.

The parts heretofore described are conventional parts of an automaticfilling bobbin winding machine and it is with these parts that thepresent invention is particularly adapted to be associated.

A tail cutter unit support is suitably secured to the exterior surfaceof the front wall of the casing H by any suitable means such as It mightbe stated that winding machines of this type are usually provided withsuitable threaded bores for reception of the screws 61 so the improvedtail cutter may be readily applied to the machine without altering themachine. This support 66 is provided with spaced bearing portions 62 and63 in which a horizontally disposed, forwardly and rearwardly extending,shaft 64 is oscillatably mounted.

The medial portion of the shaft 64, between the bearing portions 62 and63 of the support 60, has a tubular spacing member 65 adjustably securedthereon, as by a set screw 66. The front end of the shaft 64 extendsforwardly of the bearing portion 63 and is fixedly mounted intermediatethe ends of a first pivoted member or blade supporting member 6'! which,as will be observed in Figures 2 and 4, extends inwardly and upwardlyabove the bobbin 34 positioned in the bobbin holder 32 and which has aforwardly bent substantially L-shaped portion 1%} integral therewithwhich extends in substantially parallel relation to the axis of thebobbin holder 32. This forwardly bent portion of the blade supportingmember 61 extends downwardly and has a substantially rectangular blade1! suitably secured thereto, as by screws 12.

This blade H is provided with a plurality of substantially semi-circularcavities or notches 13 in the lower or free edge thereof which, as maybe observed in Figures 3 and 5, coincide with the rings 36 on the base35 of the bobbin 34. These notches 13 define a plurality of spacedsubstantially fiat-ended projections I4 which are adapted to enter thespaces between the rings 36 when the blade H is moved into campusoperative position, in ."aimanner to be later rlescribed, the outermostoi the projections 5' movingadjacent the outer or remote edges of therings 36 in sodoing.

The end or the blade supporting :member vBl, remote from the end .towhich thesblade H is secured, has a horizontally bent tail portion -..ortab is integral. therewith whichis adapted to engage the lower end of anadjustment screw 16 when the blade i i is-move'dinto operative positionas is clearly shown in Figure :2. This adjustment screw it threadablypenetrates an outwardly projecting portion or car I! integral with thetail cutter unit support '60 and islocked in adjusted posit on by a locknut =80 threadabl mounted thereon. The support 60 has aborizontallydisposed stub shaft 81 projecting outwardly therefrom on which a bellcrank or second pivoted member, broadly designated "at 82 :isoscillatably mounted, this bell crank :82 being confined onthe stubshaft'8l by asuitable washer 83 and a cotter pin 84.

The bell crank 82 has axially spaced outwardly extending first andsecond arms 85 and 86, respectively, which are spaced apart from eachother by a suitable sleeve 81 to which they are suitably secured, thesleeve 81 being oscillatably mounted on the stub shaft 8|. These arms 85and 85 extend at substantially right angles with respect to each other.

The free end of the first arm 85 is resiliently connected to the portionof the blade supporting member iii, remote from the end to which theblade ii is secured, by means of -'a coiled tension spring '99.

The tension spring '90 is connected to the free end of the first arm 85by means of a suitable spring anchor 3i projecting inwardly from thefree end of the arm 85 and the lower end of the tension spring '90 isconnected to the tall -or outer portion of the blade supporting member-6l' by a'suitable spring anchor 92 (Figures 2, 3 and i). In order toinsure that the blade H will be moved to substantially the inoperativeposition shownin Figures 1 and l when the arm 44 is disposed insubstantially the position shown in Figure 1, a pin 93 is looselyconfined within the coils of the tension spring 90 and, upon the freeend of the first arm 85 being moved-downwardly in Figure 2, the anchor9| thereon will move the pin 93 against the anchor 92 on thebladesupporting member 6? to cause the same to move in acounter-clockwise direction in Figure 2. The function of the tensionspring 90 will be presently described.

Pivotally connected to the free or lower end of the second arm 3% of thebell crank 82, as at 95, is an irregularly bent link or connecting rod96, this connecting rod 96 being connected to the rower or free end ofthe second arm 86 of the bell crank t? by means of a cuff member H10 inwhich one end of the connecting rod or link 96 is threadably embeddedand which is held in adjusted position therein by a lock nut ifllthreadably mounted on the link 96 and bearing against the free end ofthe cuff member Hill. This connecting rod or link 96 extends rearwardlyand downwardly in a stepped manner so as to'clear the parts ii to 55heretofore described and is pivotally mounted at its rear end on thestud M heretofore described (Figures 1 and 2).

The tubular spacing member 65 (Figure 3) is of less length than thedistance between the bearing portions 62 and 63 so as to assist inobtaining 6. blade ii relativeto the ringstt on the base 0f the bobbin.frhis-spacingmembertt will also permit a relatively slight endwisemovement of the shaft LSO the projections 14 on the blade H may centerthemselves with respect to the spaces between the rings 36.

Referringto Figured there will beobserved a modified form of blade miwhich may be employed in lieu of the blade 'i-i heretofore described.Thisiblade 10'! is also adapted to be secured to the forwardly bentportion :10 of the blade support member 51 by any suitable means such asscrews 102. It win he noted that this blade 4 0! differs materiarllyfrom the blade ll in that it is provided with a plurality of spaced'fiat bottom cavities 163, which are defined by a plurality ofsubstantially V-shaped projections or prongs FM. Tneseprojectionsmflfunction in the identical manner-or" the projections '74 on the blade 1I.

Method of operation It is well-known, to those familiar with the art,themanner in which bobbins suchas the bobbin 34, are fed to the chuck orbobbin holder-32 as preceding bobbins are transferred automaticallythrough conventional means associated with-this machine and as a newbobbin is positioned in engagement with the bobbin holder 32 as shown inFigures l, 2, 3 and 4, the bobbin holderor chuck 30 32 partially recedesinto the casing II and asthe new bobbin is positioned in alinement withthe same, the tail portion of the yarn, which is indicated at T inFigures 3 and 4, is clampingly held between the bobbin holder 32 and thebase 35 of the bobbin. The carriage '20 then directs the yarn to thebobbin in a conventional manner and, in so doing, the tail portion T ofthe yarn-is pulled tightly'across the outer edges of the peripherallydisposed rings 36 on the base of the bobbin 34 as is clearly shown inFigures 3 and 4.

The chain 23 then functions in a well known manner to gradually move thecarriage 26 from left to right in Figure 1 until the bobbinis filledwith yarn and, at which time, the projection) on the carriage willengage the mating knockofi' block ll on'the cam lever rod 43 and willcause the cam lever rod 43 to move from left to right in Figure 1. Thiswill, in turn, cause the arm #5 to rotate a partial revelution in acounter-clockwise direction to impart movement to the link 96 from leftto right in Figure 1.

This willcause the bell crank 82 to move in-a counter-clockwisedirection in Figure l, with the result that the first arm will moveupwardly in Figures 1 and 2. This will cause the blade supporting member6'! to move in a clockwise direction'fr'om the position shown in Figure4 tothe position'shown in Figure 3, that is, until the tab portion 15 ofthe blade supporting member 67 engages the lower end of the adjustmentscrew 76. This adjustment screw 76 will have been adjustedin such amanner that, upon the tab it of the blade supporting. arm 61 engagingthe adjustrnentscrew T6, the walls of the notches 13, in Figure 5, willassume a position in precise closely spaced relation to the outerperipheral edges or the rings 36. The space between the outer edges ofthe rings 36 and the walls or" the notches 13 may thus be determinedwithin a few thousandths o'f-an inch as desired.

The notches 13 are of such depth that the lower edges of the projections14 on the blade H in Figure 5 will assume a position in precise closelyspaced relation to the periphery of the an optimum adjustment of the"position of the '75 base 350i the bobbin 34. Thus, 'the'clearan'cebetween the edges of the projections 14 and the base 35 of the bobbin 34and the clearance between the rings 38 and the walls of the notches 13is less than the diameter of the yarn and the tail of the yarn T, whichextends across the outer edges of the rings 36, will, due to rotation ofthe bobbin 34, engage the projections 14 on the blade H to be severedthereby, in which instance, the projections will either cut or break thetail of yarn immediately adjacent the point at which the yarn isinitially wound onto the bobbin 34.

It might be stated that, if so desired, an operator may cause the bobbin34 to transfer before it is filled by grasping the manually operable camrod trigger lever M and moving the same from left to right in Figure 1,which will, in turn, move the cam lever rod 43 from left to right toalso impart movement of the tail cutter blade H into operative position.

Whether the device is operated manually or automatically, as heretoforedescribed, the arm 45 may continue its movement in a counterclockwisedirection in Figure 1 after the portion 15 of the blade supportingmember 6'! has engaged the lower end of the adjustment screw 16 and,therefore, the tension spring 90 is provided to permit the bell crank 82to continue its movement in a counter-clockwise direction in Figure 1after the blade H has assumed the desired operative position. The bladeH is moved into operative position only momentarily and conventionalmeans disposed within the casing H of the framework l will cause theshaft 4'6, along with its arm 45, to move a partial revolution in aclockwise direction in Figure l to thus return the associated parts toinoperative position.

In this instance, the bell crank 82 is moved in a clockwise direction,in Figure 1, causing its first arm 85 to move downwardly in Figure 4until its spring anchor 91 engages the upper end of the pin 93, thelower end of the pin 93 normally resting upon the spring anchor 92 ofthe blade supporting arm 61. Upon the spring anchor 9| being moved intoengagement with the pin 93, it is evident that continued downwardmovement of the arm 86 will cause the blade supporting member 6'! tomove in a counter-clockwise direction, in Figure 3 until it assumessubstantially the position shown in Figures 1 and l. A transferoperation then takes place, that is, the bobbin on which the yarn hasbeen wound is discharged from the bobbin holder 32 and an empty bobbinreplaces the same, and the cycle in the operation of the device isrepeated as heretofore described. 1

The modified form of blade |0I functions in the identical manner inwhich the blade H functions upon being moved into and out of operatingpositio and a further description thereof is unnecessary.

In the drawings and specification, there has been set forth a preferredembodiment of the invention and although specific terms are employed,they are used in a generic and descriptive sense only, and not forpurposes of limitation, the scope of the invention being defined in theclaims.

I claim:

1. An improvement in a winding machine for winding yarn onto a bobbinprovided with a base having a plurality of spaced peripherally disposedrings thereon, said winding machine having means for receiving thebobbin and for imparting rotation thereto and also having means for 8directing the yarn to the bobbin and also having means for clampinglyholding the tail of the yarn during a winding operation and whereby theyarn will extend across the outer periphery of said rings as it is beingwound on said bobbin, said machine also having a pivoted arm extendingfrom one side thereof and also having means automatically operable upona predetermined amount of yarn being deposited on a bobbin for movingthe pivoted arm in one direction and then returning the arm to itsoriginal position, said improvement comprising a blade supporting memberpivoted intermediate its ends to the framework of the winder, a bladesecured to one end of said pivoted member and normally disposed in aninoperative position relative to the base of the bobbin during a windingoperation, means automatically operable upon a desired amount of yarnbeing wound onto said bobbin for moving the pivoted member to cause theblade to move into operative position, said blade being provided with aplurality of closely spaced substantially semi-circular cavities in itsend adjacent the bobbin, said cavities defining a plurality of spacedprojections, means limiting movement of the pivoted member upon theblade moving into operative position so the projections will enter thespaces between the rings and said cavities being of such depth that thewalls of the cavities will be disposed in precise closely spacedrelation to the outer periphery of said rings and the outer edges of theprojections will be disposed in closely spaced relation to the peripheryof the base of the bobbin for entering the path of the tail of yarnextending across the rings so as to cause a severance of said tail ofyarn, a mechanical connection between the blade supporting member andthe pivoted arm extending from the side of the machine and a resilientmeans interposed in the mechanical connection to permit movement of thepivoted arm on the side of the machine and its corresponding mechanicalconnection beyond the limited move- .-ment of the pivoted member.

2. An improvement in a winding machine provided with means forsuccessively receiving and transferring the bases of bobbins, eachhaving a plurality of spaced peripherally disposed rings on its base,said winding machine having a framework and also having means forimparting rotation to the bobbin, and also having means for directingyarn to the bobbin and also having means for clamping the yarn at thebase of the bobbin as the yarn is initially fed to the bobbin so thetail of the yarn extends across said rings and said framework alsohaving a shaft extending from one side thereof and also having an armextending radially from said shaft and also having means automaticallyoperable upon a transfer operation taking place for moving said armabout the axis of said shaft, said improvement comprising a bladesupporting member pivoted intermediate its ends on the framework, ablade secured to one end of said blade supporting member and having aplurality of closely spaced projections on its free end, saidprojections being spaced substantially parallel to the axis of a bobbinon which yarn is being wound, a bell crank pivoted on said framework andhaving a pair of radially extending arms thereon, a resilient connectionbetween one of the arms of said bell crank and the end of the bladesupporting member remote from the blade, a link pivotally connected atone end thereof to the other arm of the bell crank and 9 i pivotallyconnected at the other end thereof to said arm extending from the shaftat the side of the framework and means limiting movement of said bladesupporting member whereby, upon a predetermined amount of yarn beingdeposited on the bobbin, the arm extending from the shaft will impartmovement in one direction to the bell crank to, in turn, impart movementto the blade supporting member to cause the projections on said blade tomove into the spaces between the rings on the bobbin and whereby theprojections will come to rest in closely spaced relation to theperiphery of the base of the bobbin between said rings and in the pathof the tail of yarn extending thereacross so as to cause a severance ofthe tail and the resilient connection serving to permit movement of thebell crank in a given direction after the blade supporting member hasceased its movement.

3. An improvement in winding machine provided with means forsuccessively receiving and transferring the bases of bobbins, eachhaving a plurality of spaced peripherally disposed rings on. its base,said winding machine also having a framework and also having means forimparting rotation to. the bobbin, and also having means for'directingyarn to the bobbin and also having means for clamping the yarn at thebase of the bobbin as the yarn is initially fed to the bobbin so thetail of the yarn extends across said rings and said framework alsohaving a shaft extending from one side thereof and also having anarmextending radially from said shaft and also having meansautomatically operable upon a transfer operation taking place foroscillating said arm about the axis of said shaft, said. improvementcomprising a blade supporting member pivoted intermediate its ends onthe framework, a blade secured to one end of said blade supportingmember and having a plurality of closely spaced projections on its freeend, said projections being spaced substantially parallel to the axis ofa bobbin on which yarn is being wound, a bell crank pivoted on saidframework and having first and second radially extending arms thereon, aresilient connection between the first of the arms of said bell crankand the end of the blade supporting member remote from the blade, a linkpivotally connected at one end thereof to the second arm of the bellcrank and pivotally connected at the other end thereof to said armextending from the shaft at the side of the framework and means limitingmovement of said blade supporting member whereby, upon a predeterminedamount of yarn being deposited on the bobbin, the arm extending from theshaft will impart movement in one direction to the bell crank to, inturn, impart movement to the blade supporting member to cause theprojections on said blade to move into the spaces between the rings onthe bobbin and whereby the projections will come to rest in closelyspaced relation to the periphery of the base of the bobbin between saidrings and in the path of the tail of yarn extending thereacross so as tocause a severance of the tail and the resilient connection serving topermit movement of the bell crank in a same direction after the bladesupporting member has ceased its movement, the resilient connectionincluding a coiled tension spring connected at one end thereof to thefirst arm of the bell crank and connected at its other end to the end ofthe blade supporting member remote from the end to which the blade issecured, a pin disposed within the confines of the tension spring andopposed ends thereof nor-' mally engaging the bell crank and the bladesupporting member so as to permit the bell crank tocontinue its movementin said same direction after the blade supporting member has ceased itsmovement and to permit the bell crank to move the blade supportingmember to inoperative position upon movement of the arm extending fromits said shaft at the side of the framework in the opposite direction.

4. In a winding machine for winding yarn on bobbins having a baseprovided with a plurality of spaced rings encircling the base of thebobbins and across the tail of the yarn is passed at the beginning ofthe winding operation whereby the tail of the yarn rotates with thebobbin, said machine also having a pivoted arm extending from one sidethereof and means automatically operable upon a predetermined amount ofyarn being deposited on a bobbin for moving the pivoted arm in onedirection and then returning thearm to its original position; thecombination of movable means mounted adjacent the base of the bobbin andhaving a plurality of projections thereon adapted to pass between saidrings simultaneously, said movable means normally occupying aninoperative position relative to the base of the bobbin during a windingoperation, mechanical connections between said movable means and saidpivoted arm whereby said pivoted arm will.

move the projections on said movable means be tween the ringssimultaneously and into the path of the tail of yarn to break the sameupon the completion ofwinding of yarn on a bobbin and then return saidmovable means to its normal position, and a resilient means interposedin said mechanical connections to permit movement of the pivoted arm;and its corresponding connections after the projections on the movablemeans have passed between said rings.

5. In a winding machine for winding yarn onto a bobbin having aplurality of spaced peripherally disposed rings thereon said machinehaving means for receiving the bobbins, one at a time,

' and for imparting rotation thereto, means for directing the yarn tothe bobbin, means for clampingly holding the tail of yarn during thewinding operation whereby the yarn will extend across the outerperiphery of said rings as it is being wound on said bobbin, saidmachine also having a first pivoted arm extending from one side thereofand means automatically operable upon a predetermined amount of yarnbeing deposited on a bobbin for moving the pivoted arm in one directionand then returning the arm to its original position; the combination ofa blade supporting member pivoted intermediate its ends to the frameworkof the winder, a blade fixed to one end of said blade supporting memberand normally disposed in an inoperative position relative to the base ofthe bobbin during a winding operation, a second pivoted arm spaced fromthe blade supporting member, a, mechanical connection between the secondpivoted arm and the first pivoted arm extending from one side of themachine, a resilient means connecting the second pivoted arm to theblade supporting member and being relaxed while the blade is in saidnormally inoperative position whereby said blade will be resilientlymoved into operative position relative to the rings on the bobbin forensnaring and causing a severance of said tail of yarn upon movement ofsaid first pivoted arm in said one direction.

6. In a structure according to claim 5, said blade having a plurality ofclosely spaced projections on its end adjacent the bobbin and being soarranged as to enter the spaces between the rings when moved tooperative position, and means limiting movement of said blade towardoperative position whereby said resilient means permits movement of thefirst pivoted arm on the side of the machine and its correspondingmechanical connections beyond the limited movement of the bladesupporting member.

7. In a winding machine provided with means for successively receivingand transferring the bases of bobbins, each having a plurality of spacedperipherally disposed rings on its base, said winding machine having aframework, means for imparting rotation to the bobbin, means fordirecting yarn to the bobbin, means for clamping the yarn at the base ofthe bobbin as the yarn is initially fed thereto so the tail of yarnextends across said rings, a shaft extending from one side of saidframework, an arm extending radially from said shaft and means operableautomatically upon the occurrence of a transfer operation foroscillatably moving said arm about the axis of said shaft; thecombination of a, blade supporting member pivoted intermediate its endson said framework, a blade fixed to one end of said blade supportingmember and having a plurality of closely spaced projections on its freeend, said projections being spaced substantially parallel to the axis ofa bobbin on which yarn is being wound, alever pivoted on said framework,a resilient connection between the lever and the end of the bladesupporting member remote from the blade, a link connection between saidlever and said arm extending from the shaft at the side of theframework, adjustable limiting means limiting movement of said bladesupporting member whereby,

during a transfer operation the arm at the side of the framework willimpart movement in one direction to said lever and the blade supportingmember to cause the projections on said blade to move into predeterminedclosely spaced relation to the base of the bobbin and between said ringsso as to cause a severance of the tail of the yarn extending across therings, and the resilient connection serving to permit movement of thelever in a given direction after the blade supporting member has ceasedits movement as limited by said limiting means.

8. In a structure according to claim '7, said resilient connectionincluding a coiled tension spring connected at one end thereof to saidlever and connected at its other end to the end of the blade supportingmember remote from the end to which the blade is fixed, a pin disposedwithin the confines of the tension spring and opposed ends thereofnormally engaging the lever and the blade supporting member so as topermit the lever to continue its movement in said given direction afterthe blade supporting member has ceased its movement and whereby saidlever will move the blade supporting member to inoperative position uponmovement of the arm at the side of the framework in the oppositedirection.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date 332,512 Hoggas M Dec. 15, 1885 539,869 Holland et al May 28,1895 2,343,935 Senfleben Mar. 14, 1944 2,361,813 Beckman Oct. 13, 19442,449,328 Schweiter Sept. 14, 1948

